Home / 7,991.46-11,986.92-2,147.76

Finding the Fourth Proportional to 7,991.46, 11,986.92 and 2,147.76

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Solution

The fourth proportional to 7,991.46, 11,986.92 and 2,147.76 is: 3,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.46 : 11,986.92 = 2,147.76 : x
  2. Step 2: Convert to fraction form
    7,991.46/11,986.92 = 2,147.76/x
  3. Step 3: Cross multiply
    7,991.46x = 11,986.92 × 2,147.76
  4. Step 4: Simplify right side
    7,991.46x = 25,745,027.30
  5. Step 5: Solve for x
    x = 25,745,027.30/7,991.46
  6. Step 6: Final answer
    x = 3,221.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.